diff --git a/README.rst b/README.rst
index 7f0f9d9a..d60691d0 100644
--- a/README.rst
+++ b/README.rst
@@ -57,13 +57,13 @@ Open the repo in a devcontainer in VScode, or in a codespace on Github.
 Testing
 -------
 
-Tests are run by tox against all supported Python versions. To run, make the following target::
+Install the development dependencies with ``uv sync``. Tests are run by tox against all supported Python versions. To run, make the following target::
 
     $> make test
 
 To run a single test::
 
-    $> make test='FunctionalTests.test_background' test_one
+    $> make test=tests/sh_test.py::FunctionalTests::test_background test_one
 
 Docs
 ----
diff --git a/tox.ini b/tox.ini
index 0f4a19d4..1af099de 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ deps =
     pytest
     coverage
 commands =
-    pytest tests/ {posargs}
+    pytest {posargs:tests/}
 
 [testenv:lint]
 deps =